The frontrunner in the race for the Republican presidential nomination yesterday said he knew nothing about Duke when asked about the matter on CNN's "State of the Union" talk show."I don't know what group you're talking about. You wouldn't want me to condemn a group that I know nothing about. I'd have to look," Trump said.

Last year, a technology blog unearthed a 1927 report according to which Fred Trump -- Donald Trump's father – was one of seven men arrested during clashes between 1,000 KKK members and 100 police officers in Queens, New York.

Trump has denied that "ridiculous" report, telling the Daily Mail, a British newspaper: "He was never arrested. He has nothing to do with this. This never happened. This is nonsense and it never happened."The Anti-Defamation League on Thursday had called on Trump to distance himself "unequivocally" from Duke and other white supremacists.

It said Duke had recently urged voters to volunteer for the Trump campaign, and quoted him as saying on his radio program: "Voting against Donald Trump at this point is really treason to your heritage."